Great little carbine, or pistol. They are rather loud for the stock low power as there are no baffles in the shroud. The Wicked Air Rifles prod erator shroud extension is priced well and the newest version is very effective.
No problem; In this case, E.S. is short for extreme spread. Meaning the difference between the highest velocity of the pellets fps ( feet per second ) and the lowest, for all the shots during the same fill of the gun.